"The Disciples of Christ and the City" World Call 1 (July, 1919)
“Above all he did not content himself with hurling invectives for emotional release and then to retire into smug, passive satisfaction. History had taught him it is not enough for people to be angry—the supreme task is to organize and unite people so that their anger becomes a transforming force.”
"Honoring Dr. DuBois", speech at International Cultural Evening at Carnegie Hall, 23 February 1968, published in Freedomways: A Quarterly Review of the Negro Freedom Movement, compiled in Esther Cooper Jackson (ed.), Freedomways Reader: Prophets In Their Own Country, p. 36 https://books.google.com/books?id=-oivNmSJOfAC&pg=PA36&dq=%22the+supreme+task+is+to+organize+and+unite%22
1960s
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Martin Luther King, Jr. 658
American clergyman, activist, and leader in the American Ci… 1929–1968Related quotes

Unmasking the False Religion of Evolution (1996)

Interview in Playboy (January 1965) https://web.archive.org/web/20080706183244/http://www.playboy.com/arts-entertainment/features/mlk/04.html
1960s

Economic Times http://articles.economictimes.indiatimes.com/2013-11-15/news/44113918_1_business-leaders-privilege-yoga-classes, 15 November 2013
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Context: So for a leader, it is very important that he is in the best of emotions within himself all the time because everything that he does, affects so many people. So there, our (India's) leadership has not worked at all, especially in the last five years. When leaders are insecure, leaders are fearful. He will then do what is good for him only. Only when he is joyful, when his experience of life is not affected by what's happening around him, he will do what is needed. We want leaders who will do what is needed, not what they need.